/Engine/Plugins/Online/OnlineServices/Source/OnlineServicesInterface/Public/Online/OnlineServicesRegistry.h
Check if an online service instance is loaded
true if the instance is loaded
bool IsLoaded ( [EOnlineServices](API\Runtime\CoreOnline\Online\UE__Online__EOnlineServices) OnlineServices, [FName](API\Runtime\Core\UObject\FName) InstanceName ) const